The phenotype of a living thing is its appearance, meaning how it looks in physical traits. The dominant allele, (the capital letter) means that even when paired with a recessive allele, (the lowercase letter) the phenotype will represent the dominant trait. This means that the plant with the genotype RrTt has a phenotype of red leaves, and tall stems. Bonus: An allele that consists of a dominant gene, and a recessive gene of the same trait, is called a heterozygous allele.
Whales play an important role in the marine ecosystem where they help provide at least half of the oxygen you breathe, and they also improve climate change. Hope that helps.
